Re: Mirroring itanium boot drive

If the system supports this, do yourself a favour and create a hardware RAID - this is possible with most current servers. Please tell what model you have.

Hope this helps!RegardsTorsten.

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Re: Mirroring itanium boot drive

Just to add this - it could be really painful to replace a SAS disk in a LVM mirror - avoid this if possible!

Hope this helps!RegardsTorsten.

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!

Re: Mirroring itanium boot drive

The rx3600 has either the built-in SAS controller (always) or an optional smartarray RAID controller.

With the built-in you can configure a mirrored pair of disks for boot disk. Unfortunately you cannot migrate online, but you need to take a backup and restore (or mirror to a third drive).

I would take an ignite backup, configure the hardware RAID and restore the image. This take less than 1 hour.

It will be a complicated procedure to replace a SAS disk in a LVM mirror configuration, believe this. If you reboot the server with a dead disk, it will get more complicated.

So take the hardware mirror option.

If you have questions, please ask.

Hope this helps!RegardsTorsten.

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!

Re: Mirroring itanium boot drive

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!

Re: Mirroring itanium boot drive

Hi

In case of new generation of Integrity systems, there are SAS HBAs and SAS Smart arrays HBAs with specific RAID levels are being offered and their use is depends on the OS platform to be used on them. You can see what RAID controller installed on the server when you power on the server and system f/w detects it.

Re: Mirroring itanium boot drive

Michael, you should update your bookmarks. Most links result in a "Document removed from the site". It lists the new link if your link is the predecessor, otherwise it will give an error only. I know, this is somehow ***@!"Q!*** ...

Hope this helps!RegardsTorsten.

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Re: Mirroring itanium boot drive

I know, I do the same from my repository usually. Unfortunately the links will change if the documents are updated. So I usually have a lot of dead links only.

:-(

Hope this helps!RegardsTorsten.

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Re: Mirroring itanium boot drive

Tim,Also it would be a good idea to *remove* the (Hardware raid) integrated mirror volume . And configured softwre raid using LVM mirroring from OS and it works fine like a normal server. And all the disk space will be available. If there are 8 disk on the 3600 , you can assign 2 disk for vg00 mirroring , remaining 6 disk can be used for other purpose completely.

Re: Mirroring itanium boot drive

I'm trying to give arguments why hardware RAID is better than LVM mirror with this system (I can tell you why, if you want), but why do you suggest the opposite now???

Hope this helps!RegardsTorsten.

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Re: Mirroring itanium boot drive

If you want to use all 8 disks it is probably the best idea to get a P400 smartarray and configure some logical drives (RAID 1, 5 or whatever).

The problem is, if you swap a bad drive that is e.g. c4t0d0 it will become c4t1d0 and your config won't match this. You can fix this, but many steps are needed. With hardware RAID, you just need to swap the disk and you are done.

Hope this helps!RegardsTorsten.

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!

Re: Mirroring itanium boot drive

It is possible to manage a disk replacement with sas disks in LVM mirror configuration, but you need to redirect the device files.

Unfortunately my links are dead, I will research ...

Hope this helps!RegardsTorsten.

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!

__________________________________________________There are only 10 types of people in the world -those who understand binary, and those who don't.__________________________________________________No support by private messages. Please ask the forum!